package org.apache.ddlutils.platform.hsqldb;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;

import org.apache.ddlutils.DdlUtilsException;
import org.apache.ddlutils.PlatformInfo;
import org.apache.ddlutils.platform.PlatformImplBase;

/**
 * The platform implementation for the HsqlDb database.
 * 
 * @version $Revision: 231306 $
 */
public class HsqlDbPlatform extends PlatformImplBase
{
    /** Database name of this platform. */
    public static final String DATABASENAME     = "HsqlDb";
    /** The standard Hsqldb jdbc driver. */
    public static final String JDBC_DRIVER      = "org.hsqldb.jdbcDriver";
    /** The subprotocol used by the standard Hsqldb driver. */
    public static final String JDBC_SUBPROTOCOL = "hsqldb";

    /**
     * Creates a new instance of the Hsqldb platform.
     */
    public HsqlDbPlatform()
    {
        PlatformInfo info = getPlatformInfo();

        info.setNonPKIdentityColumnsSupported(false);
        info.setIdentityOverrideAllowed(false);
        info.setSystemForeignKeyIndicesAlwaysNonUnique(true);

        info.addNativeTypeMapping(Types.ARRAY,       "LONGVARBINARY", Types.LONGVARBINARY);
        info.addNativeTypeMapping(Types.BLOB,        "LONGVARBINARY", Types.LONGVARBINARY);
        info.addNativeTypeMapping(Types.CLOB,        "LONGVARCHAR",   Types.LONGVARCHAR);
        info.addNativeTypeMapping(Types.DISTINCT,    "LONGVARBINARY", Types.LONGVARBINARY);
        info.addNativeTypeMapping(Types.FLOAT,       "DOUBLE",        Types.DOUBLE);
        info.addNativeTypeMapping(Types.JAVA_OBJECT, "OBJECT");
        info.addNativeTypeMapping(Types.NULL,        "LONGVARBINARY", Types.LONGVARBINARY);
        info.addNativeTypeMapping(Types.REF,         "LONGVARBINARY", Types.LONGVARBINARY);
        info.addNativeTypeMapping(Types.STRUCT,      "LONGVARBINARY", Types.LONGVARBINARY);
        // JDBC's TINYINT requires a value range of -255 to 255, but HsqlDb's is only -128 to 127
        info.addNativeTypeMapping(Types.TINYINT,     "SMALLINT",      Types.SMALLINT);

        info.addNativeTypeMapping("BIT",      "BOOLEAN",       "BOOLEAN");
        info.addNativeTypeMapping("DATALINK", "LONGVARBINARY", "LONGVARBINARY");

        info.setDefaultSize(Types.CHAR,      Integer.MAX_VALUE);
        info.setDefaultSize(Types.VARCHAR,   Integer.MAX_VALUE);
        info.setDefaultSize(Types.BINARY,    Integer.MAX_VALUE);
        info.setDefaultSize(Types.VARBINARY, Integer.MAX_VALUE);

        setSqlBuilder(new HsqlDbBuilder(this));
        setModelReader(new HsqlDbModelReader(this));
    }

    /**
     * {@inheritDoc}
     */
    public String getName()
    {
        return DATABASENAME;
    }

    /**
     * {@inheritDoc}
     */
    public void shutdownDatabase(Connection connection)
    {
        Statement stmt = null;

        try
        {
            stmt = connection.createStatement();
            stmt.executeUpdate("SHUTDOWN");
        }
        catch (SQLException ex)
        {
            throw new DdlUtilsException(ex);
        }
        finally
        {
            closeStatement(stmt);    
        }
    }
}
